[NEWS] added mpfr_sinu

[doc/mpfr.texi] improve documentation of mpfr_sinu, and say it is experimental


git-svn-id: https://scm.gforge.inria.fr/anonscm/svn/mpfr/trunk@14182 280ebfd0-de03-0410-8827-d642c229c3f4

2 files changed, 9 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 4b44201cb..113f858a9 100644
--- a/NEWS
+++ b/NEWS
@@ -22,6 +22,7 @@ https://www.gnu.org/licenses/ or write to the Free Software Foundation, Inc.,
 
 Changes from versions 4.1.* to version 4.2.0:
 - The "" release.
+- New function mpfr_sinu.
 - Bug fixes.
   In particular, for the formatted output functions (mpfr_printf, etc.),
   the case where the precision consists only of a period has been fixed
diff --git a/doc/mpfr.texi b/doc/mpfr.texi
index fb6f34734..80fabbc89 100644
--- a/doc/mpfr.texi
+++ b/doc/mpfr.texi
@@ -2275,6 +2275,12 @@ tangent of @var{op}, rounded in the direction @var{rnd}.
 @deftypefun int mpfr_sinu (mpfr_t @var{rop}, mpfr_t @var{op}, unsigned long @var{u}, mpfr_rnd_t @var{rnd})
 Set @var{rop} to the sine of @var{op} multiplied by @m{2\pi,2*Pi} and divided
 by @var{u}. Thus for @code{u=360} one gets the sine for @var{x} in degrees.
+When @var{op} multiplied by 2 and divided by @var{u} is an integer, the
+result is 0 with the same sign of @var{op}, following IEEE 754-2019, so that
+the function is odd.
+
+Note: this function is experimental and its interface might change in future
+versions.
 @end deftypefun
 
 @deftypefun int mpfr_sin_cos (mpfr_t @var{sop}, mpfr_t @var{cop}, mpfr_t @var{op}, mpfr_rnd_t @var{rnd})
@@ -4233,6 +4239,8 @@ use @code{mpfr_get_z_exp}.
 
 @item @code{mpfr_sinh_cosh} in MPFR@tie{}2.4.
 
+@item @code{mpfr_sinu} in MPFR@tie{}4.2.0 (experimental).
+
 @item @code{mpfr_snprintf} and @code{mpfr_sprintf} in MPFR@tie{}2.4.
 
 @item @code{mpfr_sub_d} in MPFR@tie{}2.4.